This Tech Fair My Ideas Are

1. VibratoCube
A speaker under a glass box with fluid that will jump around with the sound vibrations

Pros:
nice to look at,simple, should offer good sound

Cons:
Expensive, Could explode with high sound frequencies

Materials:

Glass Cube
Drill
Corn Starch
Water
Sub-Warfer Speaker

2. Power Slab
A wooden slab that acts as a stylish wireless charger for any mobile device

Pros:
Relatively Cheap, Nice To Look At, Useful

Cons:
Materials are very hard to find

Materials:

Wooden Slab
Wireless Charging Pad